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Chemistry, 16.02.2021 21:50 bryanatwin1536
On a prepare une solution d'ions thiosulfate en dissolvant 4.5g du compose Na2S2O3. 5H2O dans 250 ml de solution.
A) calculer la concentration des ions thiosulfate S2O3 2 - dans la solution.
B) 150 ML dune solution A de diiode sont dilues jusquau volume 250 ml. La solution B obtenue est dosee par la solution de thiosulfate preparee plus haut. Lequivalence est observee lorsquon a ajoute 7.25 ml de la solution de thiosulfate a 10 ml de la solution B.
Calculer la concentration en diiode de la solution A.
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Chemistry, 23.06.2019 10:30, EstherAbuwaah
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On a prepare une solution d'ions thiosulfate en dissolvant 4.5g du compose Na2S2O3. 5H2O dans 250 ml...
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